Example usage for javax.crypto Cipher doFinal

List of usage examples for javax.crypto Cipher doFinal

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Introduction

In this page you can find the example usage for javax.crypto Cipher doFinal.

Prototype

public final byte[] doFinal(byte[] input) throws IllegalBlockSizeException, BadPaddingException

Source Link

Document

Encrypts or decrypts data in a single-part operation, or finishes a multiple-part operation.

Usage

From source file:io.syndesis.rest.v1.state.ClientSideState.java

static byte[] encrypt(final String encryptionAlgorithm, final byte[] iv, final byte[] clear,
        final SecretKey encryptionKey) {
    try {//from www.j  a v  a  2  s .  c o  m
        final Cipher cipher = Cipher.getInstance(encryptionAlgorithm);

        cipher.init(Cipher.ENCRYPT_MODE, encryptionKey, new IvParameterSpec(iv));

        return cipher.doFinal(clear);
    } catch (final GeneralSecurityException e) {
        throw new IllegalStateException("Unable to encrypt the given value", e);
    }
}

From source file:cn.mrdear.pay.util.RSAUtils.java

/**
 * //from  www.ja  v a  2s .c  o m
 * 
 * @param publicKey
 *            
 * @param data
 *            ?
 * @return 
 */
public static byte[] encrypt(PublicKey publicKey, byte[] data) {
    Assert.notNull(publicKey);
    Assert.notNull(data);

    try {
        Cipher cipher = Cipher.getInstance(TRANSFORMATION, PROVIDER);
        cipher.init(Cipher.ENCRYPT_MODE, publicKey);
        return cipher.doFinal(data);
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e.getMessage(), e);
    } catch (NoSuchPaddingException e) {
        throw new RuntimeException(e.getMessage(), e);
    } catch (InvalidKeyException e) {
        throw new RuntimeException(e.getMessage(), e);
    } catch (IllegalBlockSizeException e) {
        throw new RuntimeException(e.getMessage(), e);
    } catch (BadPaddingException e) {
        throw new RuntimeException(e.getMessage(), e);
    }
}

From source file:cn.mrdear.pay.util.RSAUtils.java

/**
 * /* w w w  .  j  a v a 2 s.  c  o  m*/
 * 
 * @param privateKey
 *            ?
 * @param data
 *            ?
 * @return 
 */
public static byte[] decrypt(PrivateKey privateKey, byte[] data) {
    Assert.notNull(privateKey);
    Assert.notNull(data);

    try {
        Cipher cipher = Cipher.getInstance(TRANSFORMATION, PROVIDER);
        cipher.init(Cipher.DECRYPT_MODE, privateKey);
        return cipher.doFinal(data);
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e.getMessage(), e);
    } catch (NoSuchPaddingException e) {
        throw new RuntimeException(e.getMessage(), e);
    } catch (InvalidKeyException e) {
        throw new RuntimeException(e.getMessage(), e);
    } catch (IllegalBlockSizeException e) {
        throw new RuntimeException(e.getMessage(), e);
    } catch (BadPaddingException e) {
        throw new RuntimeException(e.getMessage(), e);
    }
}

From source file:Logic.security.java

public static String symmetricDecrypt(String text, String secretKey) {
    Cipher cipher;
    String encryptedString;/*w w  w.  j a va2s  . c  om*/
    byte[] encryptText = null;
    byte[] raw;
    SecretKeySpec skeySpec;
    try {
        raw = Base64.decodeBase64(secretKey);
        skeySpec = new SecretKeySpec(raw, "AES");
        encryptText = Base64.decodeBase64(text);
        cipher = Cipher.getInstance("AES");
        cipher.init(Cipher.DECRYPT_MODE, skeySpec);
        encryptedString = new String(cipher.doFinal(encryptText));
    } catch (Exception e) {
        e.printStackTrace();
        return "Error";
    }
    return encryptedString;
}

From source file:Encrypt.java

private static String decrypt(String message) throws Exception {
    byte[] bytesrc = convertHexString(message);
    Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
    DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8"));
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
    SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
    IvParameterSpec iv = new IvParameterSpec(key.getBytes("UTF-8"));

    cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);
    byte[] retByte = cipher.doFinal(bytesrc);
    return new String(retByte);
}

From source file:com.dc.tes.License.java

public static byte[] decrypt(byte[] src, byte[] key) throws Exception {

    // DES????/*ww  w . ja  v  a2s . c  o m*/

    SecureRandom sr = new SecureRandom();

    // ?DESKeySpec

    DESKeySpec dks = new DESKeySpec(key);

    // ?DESKeySpec??

    // SecretKey

    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");

    SecretKey securekey = keyFactory.generateSecret(dks);

    // Cipher??

    Cipher cipher = Cipher.getInstance("DES");

    // Cipher

    cipher.init(Cipher.DECRYPT_MODE, securekey, sr);

    // ??

    // ??

    return cipher.doFinal(src);

}

From source file:Main.java

/**
 * Encrypts message string using a given symmetric key.
 * @param msg Message string to encrypt.
 * @param key Key to encrypt message with.
 * @return Byte array of encrypted and encoded message.
 * @throws NoSuchAlgorithmException//  www  .jav  a  2  s . c o m
 * @throws NoSuchPaddingException
 * @throws InvalidKeyException
 * @throws IllegalBlockSizeException
 * @throws BadPaddingException
 * @throws InvalidAlgorithmParameterException
 */
public static byte[] encryptMessage(String msg, SecretKey key)
        throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException,
        BadPaddingException, InvalidAlgorithmParameterException {
    Cipher cipher = Cipher.getInstance("AES");
    byte[] init = new byte[128 / 8];
    //SecureRandom secureRandom = new SecureRandom();
    //secureRandom.nextBytes(init);
    for (int i = 0; i < 16; i++)
        init[i] = 0;
    cipher.init(Cipher.ENCRYPT_MODE, key, new IvParameterSpec(init));
    byte[] msgBytes = msg.getBytes();
    //System.out.println(android.util.Base64.encode(msgBytes, Base64.DEFAULT));
    byte[] msgCipherBytes = cipher.doFinal(msgBytes);
    return msgCipherBytes;
}

From source file:Main.java

public static byte[] aesIGEdecrypt(byte[] tmpAESiv, byte[] tmpAesKey, byte[] data) {
    try {//from  w ww. j  ava 2  s .co  m

        ByteBuffer out = ByteBuffer.allocate(data.length);

        byte[] iv2p = Arrays.copyOfRange(tmpAESiv, 0, tmpAESiv.length / 2);
        byte[] ivp = Arrays.copyOfRange(tmpAESiv, tmpAESiv.length / 2, tmpAESiv.length);

        int len = data.length / AES_BLOCK_SIZE;

        byte[] xorInput = null;
        byte[] xorOutput = null;

        SecretKeySpec keySpec = null;
        keySpec = new SecretKeySpec(tmpAesKey, "AES");
        Cipher cipher = null;
        cipher = Cipher.getInstance("AES/ECB/NoPadding");
        cipher.init(Cipher.DECRYPT_MODE, keySpec);

        byte[] input = null;
        byte[] output = null;

        for (int i = 0; i < len; i++) {
            input = Arrays.copyOfRange(data, i * AES_BLOCK_SIZE, (i + 1) * AES_BLOCK_SIZE);
            xorInput = xor(input, ivp);
            output = cipher.doFinal(xorInput);
            xorOutput = xor(output, iv2p);
            out.put(xorOutput);

            ivp = xorOutput;
            iv2p = input;
        }
        return out.array();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (NoSuchPaddingException e) {
        e.printStackTrace();
    } catch (IllegalBlockSizeException e) {
        e.printStackTrace();
    } catch (BadPaddingException e) {
        e.printStackTrace();
    } catch (InvalidKeyException e) {
        e.printStackTrace();
    }

    return null;
}

From source file:Main.java

public static String enCrypto(String txt, String key) {

    if (txt != null && !"".equals(txt) && !"null".equals(txt)) {

        try {/*from   w  ww  . j  a  v  a  2  s  . c  om*/

            StringBuffer sb = new StringBuffer();
            DESKeySpec desKeySpec = new DESKeySpec(key.getBytes());
            SecretKeyFactory skeyFactory = null;
            Cipher cipher = null;
            try {
                skeyFactory = SecretKeyFactory.getInstance("DES");
                cipher = Cipher.getInstance("DES");
            } catch (NoSuchAlgorithmException e) {
                e.printStackTrace();
            }
            SecretKey deskey = skeyFactory.generateSecret(desKeySpec);
            cipher.init(Cipher.ENCRYPT_MODE, deskey);
            byte[] cipherText = cipher.doFinal(txt.getBytes());
            for (int n = 0; n < cipherText.length; n++) {
                String stmp = (java.lang.Integer.toHexString(cipherText[n] & 0XFF));
                if (stmp.length() == 1) {
                    sb.append("0" + stmp);
                } else {
                    sb.append(stmp);
                }
            }
            return sb.toString().toUpperCase(Locale.US);

        } catch (Exception e) {

            e.printStackTrace();
        }
    }
    return null;
}

From source file:com.aspose.showcase.qrcodegen.web.api.util.StringEncryptor.java

public static String encrypt(String data, String password) throws Exception {

    Security.addProvider(new BouncyCastleProvider());
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding", "BC");

    final Random r = new SecureRandom();
    byte[] salt = new byte[SALT_SIZE];
    r.nextBytes(salt);/*from  w w  w  .  jav  a  2  s  .  co m*/

    SecretKeyFactory fact = SecretKeyFactory.getInstance("PBEWITHMD5AND128BITAES-CBC-OPENSSL", "BC");

    cipher.init(Cipher.ENCRYPT_MODE,
            fact.generateSecret(new PBEKeySpec(password.toCharArray(), salt, PBE_KEY_SALE_SIZE)));

    byte[] encVal = cipher.doFinal(data.getBytes());

    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    // writing encrypted data along with the salt in the format readable by
    // open ssl api
    bos.write("Salted__".getBytes());
    bos.write(salt);
    bos.write(encVal);
    String encryptedValue = new String(Base64.encode(bos.toByteArray()));
    bos.close();

    return encryptedValue;

}